Your Neighbor’s Leak Damaged Your Condo: Who Pays and What to Do First

When a leak from an upstairs unit or a shared plumbing riser damages your condo, the coverage question is almost never as straightforward as “my neighbor flooded me, so their insurance pays.” Whether you collect from your neighbor’s policy, your own policy, or the condo association’s master policy depends on what caused the leak, where the pipe sits relative to the condo declaration, and which policy type is in play. Getting the answer wrong costs you time, an unnecessary deductible, and potentially a dispute that outlasts the repair itself. Thorough documentation before anything is dried or demolished is the foundation of every recovery option available to you. The same holds true for water damage restoration scoping: the pre-remediation record defines the claim. Category and class are established to the IICRC S500 standard before either policy is billed.

Two Policies, One Leak: The Basic Framework

Every condo owner in Massachusetts typically carries an HO-6 policy, which covers the interior of their individual unit and their personal property. The condo association carries a master policy covering the building structure and common elements. Which policy responds to your neighbor’s leak turns entirely on where the pipe that failed sits in the ownership and responsibility matrix defined by the condo declaration.

If the pipe that failed is inside your neighbor’s unit and exclusively serves their unit, a supply line to their toilet or a fill hose on their washing machine, then your neighbor’s HO-6 liability section is the first line of response for the damage caused in your unit. Liability coverage on an HO-6 pays for damage caused by the policyholder’s negligence, which includes a failed appliance connection or a long-unrepaired valve.

If the pipe is inside a shared wall, in a plumbing riser serving multiple units, or in any area defined as a common element under the declaration, then the association’s master policy may be the primary coverage vehicle. Whether the association’s deductible becomes your financial exposure depends on the bylaws and on whether you can establish that the association had notice of a maintenance problem and failed to act.

Your neighbor’s insurer does not automatically pay your claim simply because the water came from their unit. Causation and responsibility under the governing documents must be established first.

What Do the Massachusetts Condo Documents Actually Control?

The Massachusetts Condominium Act, Chapter 183A, governs condo ownership statewide, but it delegates the definition of “unit” versus “common element” to each association’s Declaration of Condominium and bylaws. In older Boston condo buildings, many of which were converted from Dorchester and South End triple-deckers in the 1980s and 1990s, those declarations can be remarkably vague on where the unit boundary ends for plumbing purposes. Chapter 183A provides a default position: walls, floors, and ceilings bounding a unit are common elements up to the unfinished surface. A pipe inside a shared wall, however, may be defined differently in different declarations.

Before you assume your neighbor’s policy is solely responsible, read the relevant section of your association’s declaration. The association’s management company or registered agent is required to provide a copy on request. The operative question is who bears maintenance responsibility for the component that failed. Maintenance responsibility in condo documents generally maps directly to insurance responsibility, and the declaration’s language is what a carrier will cite when making a coverage decision.

If the declaration is ambiguous, which is common in older converted buildings, the claim may ultimately involve both carriers and potentially the master policy, with allocation negotiated between insurers. This is exactly the scenario where having your own contractor’s documented scope, rather than the opposing party’s contractor’s scope, protects your position.

Document Everything Before Cleanup Begins

The single most important action before a water damage contractor touches your unit is to create a thorough pre-remediation record. Photographs and video of every affected surface, every piece of damaged personal property, every moisture meter reading taken before any demolition, and every reading of the source area if accessible. The timestamp on that documentation is your evidence of the extent of damage at the time of the event.

Equally important is a written record of the event sequence: when you discovered the damage, what you observed, any communication from your neighbor or the building management, and whether any water supply was shut off and by whom. That timeline record establishes causation, which matters for both your own insurer and for any recovery action that follows.

Call your insurer before cleanup begins. Most HO-6 policies have a prompt reporting requirement, and some carriers will send their own adjuster or desk review before approving scope. Reporting after the unit has been dried reduces your documentation leverage significantly.

Subrogation: What Does It Mean for You in Plain Terms?

Subrogation is the mechanism by which your insurer, after paying your claim, steps into your position legally and pursues reimbursement from the party responsible for the loss. In a condo leak scenario, that means your insurer pays your claim and then pursues your neighbor’s insurer for the cost of that payment. Subrogation clauses are standard in HO-6 policies, and Massachusetts insurers use them routinely in building-neighbor leak disputes.

From your practical standpoint: you file your claim, pay your deductible, and get your unit repaired. Your carrier handles the recovery action independently. If that recovery succeeds, you may receive your deductible back. If it does not, you generally do not owe more than your deductible regardless of the outcome.

What subrogation depends on is evidence of cause. Your insurer needs to demonstrate, to the opposing carrier’s satisfaction or to a court’s if necessary, that the neighbor’s pipe or negligence caused the loss. A documented scope from a licensed restoration contractor, showing moisture intrusion from above with moisture readings, timeline, and material mapping, is the evidentiary foundation that makes a subrogation claim viable. A dried and patched unit with no pre-remediation record is a much harder case for your carrier to pursue.

One Pattern That Consistently Hurts Condo Owners

There is a sequence that regularly produces bad outcomes in these situations. The neighbor or the association contacts you and offers to handle the remediation through their preferred contractor. The framing is efficiency: one contractor, one insurance claim, faster resolution for everyone. What that framing omits is that the contractor they send documents in the interest of the party who hired them.

That contractor’s scope defines what damage occurred in your unit, what materials require replacement, and what the remediation cost will be. If their scope understates the damage, your unit may receive inadequate drying, materials that should be replaced may be treated as salvageable, and the scope submitted to the carrier will reflect that conservative view. Correcting an underscope after remediation is complete is substantially harder than establishing the correct scope before work begins.

The right sequence is to call your own insurer first, document before remediation starts, and retain your own water damage contractor. For emergency water extraction and structural drying on covered losses, Studio 24 Restoration Group handles direct billing to your carrier with no upfront cost to you. Our scope documentation is built from the first moisture reading to the final drying log in the format adjusters and subrogation attorneys use. Call (781) 390-9855 any time, day or night.